package SDS;

public class Main {
    public static void main(String[] args) {
        SDS sds = new SDS("Hello");
        System.out.println(sds.getAllData());  // 输出: Hello

        sds.append(", World!");
        System.out.println(sds.getAllData());  // 输出: Hello, World!

        sds.append("I really missed you!");
        System.out.println(sds.getAllData());  // 输出: Hello, World!I really missed you!
    }
}
